When she married Aristotle Onassis in 1968, Jackie Kennedy became Jackie Onassis or Jackie O (as she was affectionately known) Until her death in 1994, she never had a bad fashion day and never took a bad photo, which is why she is still referred to as one of the most influential people in fashion.
Maria Callas and Aristotle Onassis were introduced in 1957. They took a three-week cruise along the Greek and Turkish coasts in the summer of 1959, where their notorious affair began. (Onassis was then married to Tina Livanos. He married Jackie Kennedy in 1968).